General Operation; Compressor Controls; Pressure Switch Adjustment - Ingersoll Rand UP5 4 Instalación, Operación Y Mantenimiento

71113.13.16

GENERAL OPERATION

The compressor is an electric motor driven, single stage
screw compressor, complete with accessories piped, wired
and baseplate mounted . It is a totally self contained air
compressor package .
The standard compressor is designed to operate in an
ambient range of 35 .6°F - 104°F (2°C to 40°C) . The maximum
temperature is applicable up to a maximum elevation
of 3280ft (1000m) above sea level . Above this altitude
significant reduction in maximum allowable ambient
temperature is required .
Compression in the screw type air compressor is created by
the meshing of two (male & female) helical rotors .
The air/coolant mixture discharges from the compressor
into the separation system . This system removes all but a
few PPM of the coolant from the discharge air . The coolant
is returned to the cooling system and the air passes through
the aftercooler and out of the compressor .
Cooling air is moved through the coolers by the cooling fan
and discharged from the machine .
Cooling air is drawn in at the end of the machine
package passing through the filter and cooler before
being discharged from the top of the machine . Care
should be taken to avoid blocking the airflow, or
causing any restriction in excess of the maximum
backpressure allowed for ducting .
do not direct the airflow at face or eyes .
By cooling the discharge air, much of the water vapour
naturally contained in the air is condensed and may be
drained from the downstream piping and equipment .
The coolant system consists of a sump, cooler, thermostatic
valve and a filter . When the unit is operating, the coolant is
pressurized and forced to the compressor bearings .
The compressor load control system is automatic on-off line .
This allows the compressor to maintain a set discharge line
pressure by varying output capacity to match the system
demand . The unit is provided with an automatic stop and
restart system for use in plants where the air demand varies
sufficiently to allow a compressor to shut down and save
power . Significant system volume will assist this and is
recommended .
When the compressor is equipped with the optional dryer,
the dryer will cycle on and off with the compressor .
when the unit stops running as the result of low air
demand, normally indicated by auto restart light, it
may restart and return to load at any time .
Safety of operation is provided as the compressor will
shut down if excessive temperatures or electrical overload
conditions should occur .

OPERATING INSTRUCTIONS
CAUTION
WARNING
This unit is not designed or intended to operate when
contaminated with silicone . Lubricants, greases or
other items containing silicone should not be used on
this unit .
LOw dEMANd APPLICATIONS
during periods of low demand, the compressor may
not reach its normal operating temperature . Sustained
operation at low demand can result in the build up
of condensate in the coolant . If this situation occurs,
the lubricating characteristics of the coolant can be
impaired which may lead to damage of the compressor .
THE COMPRESSOR SHOULd BE ALLOwEd AMPLE
LOAdEd RUNNING TIME OF AT LEAST 10 MINUTES PER
HOUR dURING NORMAL dAILy USE .

COMPRESSOR CONTROLS

dIRECT ONLINE STARTING:
The compressor is equipped for Automatic Start & Stop
Control .When the receiver tank pressure reaches the factory
pre–set maximum pressure, the pressure switch stops the
unit . When the receiver tank pressure drops below the factory
pre–set minimum . The pressure switch resets and restarts the
unit .
The pressure switch cover can be removed by unscrewing the
two screws holding the cover .

PRESSURE SwITCH AdjUSTMENT:

The compressor package will cut–in and cut–out at factory
preset pressure settings . Adjust the pressure switch only if
absolutely necessary . Adjustments are to be carried out only
when the switch is mounted, under pressure and voltage–
free .
High voltage is present at the pressure switch contacts
when the power supply is connected . disconnect,
lock and tag main power supply before making
adjustments .
do not adjust the pressure switch to exceed the
maximum discharge pressure of the unit .
NOTE
when replacing the pressure switch cover, ensure the
selector knob on the cover and the lever on the switch
are both in the "OFF" position .
NOTE
when the compressor is equipped with the optional
dryer and filters, the pressure switch differential should
be increased 10psi to account for the added pressure
drop of the filters and dryer .
CAUTION
CAUTION
WARNING
WARNING
80447113 Rev.A